Types of Chips : Discontinuous chips , Continuous chips , Continuous chips with built up edge

 The following three types of chips are produced during metal cutting or machining : 

1. Discontinuous chips 

  • These types of chips are usually formed during machining of brittle materials like cast iron

  • The low cutting speed and small rake angle of the tool are responsible for the formation of discontinuous chips . 

2 Continuous chips 

  • These types of chips are produced during machining of ductile mate rials like mild steel

  • The high cutting speed and large rake angle of the tool will result in the formation of continuous chips . 

  • These chips are in the form of long coils having the same thickness throughout . 

3. Continuous chips with built up edge 

  • These types of chips are also produced during machining of ductile materials

  • The low cutting speed and small rake angle of the tool will result in the formation of continuous chips with built up edge . 

  • These chips are also formed when the cutting edge of the tool is dull .